Mini PCI Bus

最新推荐文章于 2024-11-03 21:23:44 发布

perry_peng

最新推荐文章于 2024-11-03 21:23:44 发布

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文章标签： audio codec interface parallel signal pair

本文深入探讨了Mini PCI总线的描述和引脚布局，解释了它作为个人计算机本地扩展槽的原始发展，以及它在台式机与笔记本电脑之间的区别应用。包括Mini PCI总线的电气要求、操作模式、信号反射机制、不同大小和类型的Mini PCI板尺寸，以及其与标准PCI总线的比较。此外，还详细介绍了Mini PCI总线的两种不同针脚布局，适用于Type I/II和Type III卡。

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Mini-Peripheral Component Interface Bus For NoteBook Computers

Mini PCI Bus Description and Pin Outs

A Brief Description of the Mini Peripheral Component Interface 'MiniPCI' Bus.

The Peripheral Component Interface 'PCI' Bus was originally developed as a local bus expansion slot for the Personal Computer, and was coined the PCI Local Bus. The specification started as an add-on to the ISA form factor with the PCI bus requiring its own slot. The PCI spec defines the Electrical requirements for the interface. No bus terminations are specified, the bus relies on signal reflection to achieve level threshold. The first Desk Top version of the PCI bus ran at 33MHz with a 32 bit bus (133MBps), the current Desk Top version runs at 66MHz with a 64 bit bus. The Lap-Top version [Mini-PCI] operates at 32MHz with a 32 bit bus. The PCI bus operates either synchronously or asynchronously with the "mother Board bus rate. While operating asynchronously the bus will operate at any frequency from 66MHz down to (and including) 0Hz. Flow control is added to allow the bus to operate with slower devices on the bus, allowing the bus to operate at their speed. PCI is an unterminated bus, the signal relay on signal reflections to attain there final value. The PCI interface is used in Desktop computers while the Mini PCI interface is used in Laptop or notebook computers.

The Mini PCI specification uses a subset of the PCI signal set. Mini-PCI is a small form factor version of a PCI card. Because the Mini-PCI bus only uses 3.3 volts the boards do not require connector keying to indicate a 3.3v board or 5 volt board. However 5 volts is available for audio applications. Mini PCI only implements the 32-bit PCI bus, 64-bit data buses are not supported. There are three card configurations; Type I, Type II, and Type III cards. Type II cards have an RJ45 mounted connector, while Types I and III provide support for and RJ45 connector. The card edge connector used for each type include;Type I and II use a 100-pin connector, while Type III uses a 124-pin edge connector. The connector for Type I and II differ from Type III, which supports a card edge.

Additional card sizes are defined to include Type I/II/IIIA and I/II/IIIB.

**Mini PCI Form Factors and Types**
PWB Size	Board Type	Board Form Factor
100-Pin Stacking	IA	7.5 x 70 x 45mm
100-Pin Stacking	IB	5.5 x 70 x 45mm
100-Pin Stacking	IIA	7.5 x 70 x 45mm
100-Pin Stacking	IIB	17.44 x 78 x 45mm
124-Pin Card Edge	IIIA	5.5 x 78 x 45mm
124-Pin Card Edge	IIIB	5 x 64.7 x 55.8mm
124-Pin Card Edge	IIIA	2.4 x 59.6 x 50.95mm
124-Pin Card Edge	IIIB	2.4 x 59.6 x 44.6mm

The physical dimensions of the 124-Pin Mini PCI card is listed above, the fingers run on the long edge.
MiniPCI Sizes listed are; Height x Length x Width

In addition to the PCI bus Mini PCI also provides for additional buses including; an Audio bus, a power management bus, a LAN bus, and a Modem bus.
These additional buses are not defined in other standards.

Mini-PCI Bus 100-Pin Pinout

The MinPCI bus is used in Laptop and NoteBook computers. Also refer to the MiniPCI Bus Description page.
Mini-PCI uses a reduced pinout than the normal PCI bus used in Desktop computers [Personal Computer buses].
The Mini-PCI standard is a Parallel bus standard based on the Parallel PCI bus standard, which is different than the ExpressPCI bus standard.
There are 2 different connector pinouts defined in the Mini-PCI specification, one for type I and type II, and another connector for type III.

**MiniPCI Pinout, 100 Pins; Type I/II Connector**
Pin #	Pin Name	Pin #	Pin Name	Pin #	Pin Name	Pin #	Pin Name
1	INTB#	2	+5v	51	SERR#	52	STOP#
3	3.3v	4	INTA#	53	Ground	54	+3.3v
5	Reserved	6	Reserved	55	PERR#	56	DEVSEL#
7	3.3AUX	8	C/BE[1]#	57	C/BE[1]#	58	Ground
9	CLK	10	RST#	59	AD[14]	60	AD[15]
11	Ground	12	3.3v	61	Ground	62	AD[13]
13	REQ#	14	GNT#	63	AD[12]	64	AD[11]
15	3.3v	16	Ground	65	AD[10]	66	Ground
17	AD[31]	18	PME#	67	Ground	68	AD[09]
19	AD[29]	20	Reserved	69	AD[08]	70	C/BE[0]#
21	Ground	22	AD[30]	71	AD[07]	72	3.3v
23	AD[27]	24	3.3v	73	3.3v	74	AD[06]
25	AD[25]	26	AD[28]	75	AD[05]	76	AD[04]
27	Reserved	28	AD[28]	77	Reserved	78	AD[02]
29	C/BE[3]#	30	AD[24]	79	AD[03]	80	AD[00]
31	AD[23]	32	IDSEL	81	5v	82	Reserved_WIP ²
33	Ground	34	Ground	83	AD[01]	84	Reserved_WIP ²
35	AD[21]	36	AD[22]	85	Ground	86	Ground
37	AD[19]	38	AD[20]	87	AC_SYNC	88	M66EN
39	Ground	40	PAR	89	AC_SDATA_IN	90	AC_SDATA_OUT
41	AD[17]	42	AD[18]	91	AC_BIT_CLK	92	AC_CODEC_ID0#
43	C/BE[2]#	44	AD[16]	93	AC_CODEC_ID1#	94	AC_RESET#
45	IRDY#	46	Ground	95	MOD_AUDIO_MON	96	Reserved
47	3.3v	48	Frame#	97	Audio_GND	98	Ground
49	CLKRUN#	50	TRDY#	99	SYS_AUDIO_OUT	100	SYS_AUDIO_IN

Mini-PCI Bus 124-Pin Pinout

The MinPCI bus is used in Laptop and Note-Book computers.
Mini-PCI uses a reduced pinout than the normal PCI bus used in Desk-top computers.
There are 2 different connector pinouts defined in the Mini-PCI specification, one for type I and type II, and another connector for type III.
The Mini-PCI standard is a Parallel bus standard based on the Parallel PCI bus standard, which is different than the ExpressPCI bus standard.

**MiniPCI Pinout, 124 Pins; Type III Connector**
PIN #	Signal	Description	PIN #	Signal	Description
1	TIP	1 Conductor, local loop wire pair	63	3.3V	3.3 V Supply voltage
-	Key	-	64	FRAME#	Indicates Bulk Transfer
2	RING	1 Conductor, local loop wire pair	65	CLKRUN#	Stops clock on certain mobile PCI devices
3	8PMJ-3	Pin 3 of an 8-pin modular jack	66	TRDY#	Target Ready
4	8PMJ-1	Pin 1 of an 8-pin modular jack	67	SERR#	Catastrophic system error
5	8PMJ-6	Pin 6 of an 8-pin modular jack	68	STOP#	Target wishes to end transfer
6	8PMJ-2	Pin 2 of an 8-pin modular jack	69	GROUND	Ground
7	8PMJ-7	Pin 7 of an 8-pin modular jack	70	3.3V	3.3 V Supply voltage
8	8PMJ-4	Pin 4 of an 8-pin modular jack	71	PERR#	Indicates Parity Error
9	8PMJ-8	Pin 8 of an 8-pin modular jack	72	DEVSEL#	PCI Device Select
10	8PMJ-5	Pin 5 of an 8-pin modular jack	73	C/BE[1]#	Byte Enable
11	LED1_GRNP	Interface for external LEDs	74	GROUND	Ground
12	LED2_YELP	Interface for external LEDs	75	AD[14]	Multiplexed Address/Data Bus
13	LED1_GRNN	RF Silent input	76	AD[15]	Multiplexed Address/Data Bus
14	LED2_YELN	Interface for external LEDs	77	GROUND	Ground
15	CHSGND	Chassis Ground	78	AD[13]	Multiplexed Address/Data Bus
16	RESERVED	-	79	AD[12]	Multiplexed Address/Data Bus
17	INTB#	Interrupt Request B	80	AD[11]	Multiplexed Address/Data Bus
18	5V	5 V Supply voltage	81	AD[10]	Multiplexed Address/Data Bus
19	3.3V	3.3 V Supply voltage	82	GROUND	Ground
20	INTA#	Interrupt Request A	83	GROUND	Ground
21	RESERVED	-	84	AD[09]	Multiplexed Address/Data Bus
22	RESERVED	-	85	AD[08]	Multiplexed Address/Data Bus
23	GROUND	Ground	86	C/BE[0]#	Byte Enable
24	3.3VAUX	3.3 V supply-uninterrupted	87	AD[07]	Multiplexed Address/Data Bus
25	CLK	PCI Clock	88	3.3V	3.3 V Supply voltage
26	RST#	PCI Reset	89	3.3V	3.3 V Supply
27	GROUND	Ground	90	AD[06]	Multiplexed Address/Data Bus
28	3.3V	3.3 V Supply voltage	91	AD[05]	Multiplexed Address/Data Bus
29	REQ#	PCI Bus Request	92	AD[04]	Multiplexed Address/Data Bus
30	GNT#	PCI Bus Grant	93	RESERVED	-
31	3.3V	3.3 V Supply voltage	94	AD[02]	Multiplexed Address/Data Bus
32	GROUND	Ground	95	AD[03]	Multiplexed Address/Data Bus
33	AD[31]	Multiplexed Address/Data Bus	96	AD[00]	Multiplexed Address/Data Bus
34	PME#	Power Management Event	97	5V	5 V Supply voltage
35	AD[29]	Multiplexed Address/Data Bus	98	RESERVED_WIP5	-
36	RESERVED	-	99	AD[01]	Multiplexed Address/Data Bus
37	GROUND	Ground	100	RESERVED_WIP5	-
38	AD[30]	Multiplexed Address/Data Bus	101	GROUND	Ground
39	AD[27]	Multiplexed Address/Data Bus	102	GROUND	Ground
40	3.3V	3.3 V Supply voltage	103	AC_SYNC	AC97 Sync
41	AD[25]	Multiplexed Address/Data Bus	104	M66EN	Enables 66 MHz PCI bus
42	AD[28]	Multiplexed Address/Data Bus	105	AC_SDATA_IN	AC97 Data Input
43	RESERVED	-	106	AC_SDATA_OUT	AC97 Data Output
44	AD[26]	Multiplexed	107	AC_BIT_CLK	AC97 Bit Clock
45	C/BE[3]#	Byte Enable	108	AC_CODEC_ID0#	Identifier for AC97 CODEC
46	AD[24]	Multiplexed Address/Data Bus	109	AC_CODEC_ID1#	Identifier for AC97 CODEC
47	AD[23]	Multiplexed Address/Data Bus	110	AC_RESET#	AC97 Reset
48	IDSEL	Initialization Device Select	111	MOD_AUDIO_MON	Modern Audio Monitor
49	GROUND	Ground	112	RESERVED	-
50	GROUND	Ground	113	AUDIO_GND	Analog Ground for line-level audio
51	AD[21]	Multiplexed Address/Data Bus	114	GROUND	Ground
52	AD[22]	Multiplexed Address/Data Bus	115	SYS_AUDIO_OUT	Telephone Audio Out
53	AD[19]	Multiplexed Address/Data Bus	116	SYS_AUDIO_IN	Telephone Audio In
54	AD[20]	Multiplexed Address/Data Bus	117	SYS_AUDIO_OUT GND	Analog Ground for telephone audio
55	GROUND	Ground	118	SYS_AUDIO_IN GND	Analog Ground for telephone audio
56	PAR	Parity Bit	119	AUDIO_GND	Analog Ground for line-level audio
57	AD[17]	Multiplexed Address/Data Bus	120	AUDIO_GND	Analog Ground for line-level audio
58	AD[18]	Multiplexed Address/Data Bus	121	RESERVED	-
59	C/BE[2]#	Byte Enable	122	MPCIACT#	MiniPCI Function Active
60	AD[16]	Multiplexed Address/Data Bus	123	VCC5VA	5V Analog
61	IRDY#	Initiator Ready	124	3.3VAUX	3.3 V supply-uninterrupted
62	Ground	Ground	-	-	-